btypes
Aliases with correct capitalization for built-in Python types.
PEP8 states that classes should have names in CamelCase.
However, all the built-in types are lower case: str
, bool
, int
, float
, list
, dict
, etc.
This library provides aliases for all these types that are capitalized correctly.
They are straightforward aliases and can be used exactly like the original types.
Install
Requires Python 3.9+.
pip install btypes
Examples
from btypes import Int, List, Str
def comma_list(lst: List[Int]) -> Str:
return ", ".join(Str(e) for e in lst)
def range_list(limit: Int) -> List[Int]:
return List(range(limit))
Also works with pattern matching:
from btypes import Bool, Str, Union
def print_type(x: Union[Bool, Str]) -> None:
match x:
case Bool():
print("a boolean")
case Str():
print("a string")
FAQs
Why require Python 3.9 as the minimum version?
Because Python 3.9 introduced generic collections in the standard library: list[int]
, dict[str, float]
;
and the whole point of btypes
is that you can use the same identifier as constructor and as type annotation.